Datasheet Texas Instruments SN74ALS21ANSR — 数据表








 
 

 
SDAS085B -APRIL 1982 -REVISED DECEMBER 1994 SN54ALS21A, SN54AS21 . J PACKAGE
SN74ALS21A, SN74AS21 . D OR N PACKAGE
(TOP VIEW) 1A
1B
NC
1C
1D
1Y
GND description
These devices contain two independent 4-input
positive-AND gates. They perform the Boolean
functions Y = A B C D or Y = A + B + C + D
in positive logic.
The SN54ALS21A and SN54AS21 are
characterized for operation over the full military
temperature range of -55В°C to 125В°C. The
SN74ALS21A and SN74AS21 are characterized
for operation from 0В°C to 70В°C.
FUNCTION TABLE
(each gate)
INPUTS …